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import mpiunittest as unittest
from mpi4py import MPI
def ch3_nemesis():
return "ch3:nemesis" in MPI.Get_library_version()
@unittest.skipIf(MPI.COMM_WORLD.Get_size() < 2, "mpi-world-size<2")
class BaseTestIntercomm:
#
BASECOMM = MPI.COMM_NULL
INTRACOMM = MPI.COMM_NULL
INTERCOMM = MPI.COMM_NULL
def setUp(self):
size = self.BASECOMM.Get_size()
rank = self.BASECOMM.Get_rank()
if rank < size // 2:
self.COLOR = 0
self.LOCAL_LEADER = 0
self.REMOTE_LEADER = size // 2
else:
self.COLOR = 1
self.LOCAL_LEADER = 0
self.REMOTE_LEADER = 0
self.INTRACOMM = self.BASECOMM.Split(self.COLOR, key=0)
Create_intercomm = MPI.Intracomm.Create_intercomm
self.INTERCOMM = Create_intercomm(
self.INTRACOMM,
self.LOCAL_LEADER,
self.BASECOMM,
self.REMOTE_LEADER,
)
def testConstructor(self):
with self.assertRaises(TypeError):
MPI.Intercomm(self.INTRACOMM)
with self.assertRaises(TypeError):
MPI.Intracomm(self.INTERCOMM)
def tearDown(self):
self.INTRACOMM.Free()
self.INTERCOMM.Free()
def testHandle(self):
intercomm = self.INTERCOMM
cint = intercomm.toint()
if cint != -1:
newcomm = MPI.Comm.fromint(cint)
self.assertEqual(newcomm, intercomm)
self.assertIs(type(newcomm), MPI.Intercomm)
fint = intercomm.py2f()
if fint != -1:
newcomm = MPI.Comm.f2py(fint)
self.assertEqual(newcomm, intercomm)
self.assertIs(type(newcomm), MPI.Intercomm)
def testLocalGroupSizeRank(self):
intercomm = self.INTERCOMM
local_group = intercomm.Get_group()
self.assertEqual(local_group.size, intercomm.Get_size())
self.assertEqual(local_group.size, intercomm.size)
self.assertEqual(local_group.rank, intercomm.Get_rank())
self.assertEqual(local_group.rank, intercomm.rank)
local_group.Free()
def testRemoteGroupSize(self):
intercomm = self.INTERCOMM
remote_group = intercomm.Get_remote_group()
self.assertEqual(remote_group.size, intercomm.Get_remote_size())
self.assertEqual(remote_group.size, intercomm.remote_size)
remote_group.Free()
def testMerge(self):
basecomm = self.BASECOMM
intercomm = self.INTERCOMM
if basecomm.rank < basecomm.size // 2:
high = False
else:
high = True
intracomm = intercomm.Merge(high)
self.assertEqual(intracomm.size, basecomm.size)
self.assertEqual(intracomm.rank, basecomm.rank)
intracomm.Free()
def testCreateFromGroups(self):
lgroup = self.INTERCOMM.Get_group()
rgroup = self.INTERCOMM.Get_remote_group()
try:
Create_from_groups = MPI.Intercomm.Create_from_groups
intercomm = Create_from_groups(lgroup, 0, rgroup, 0)
except NotImplementedError:
self.assertLess(MPI.Get_version(), (4, 0))
self.skipTest("mpi-comm-create_from_group")
except MPI.Exception as exc:
UNSUPPORTED = MPI.ERR_UNSUPPORTED_OPERATION
if exc.Get_error_class() != UNSUPPORTED:
raise
else:
ccmp = MPI.Comm.Compare(self.INTERCOMM, intercomm)
intercomm.Free()
self.assertEqual(ccmp, MPI.CONGRUENT)
finally:
lgroup.Free()
rgroup.Free()
def testSplit(self):
base = self.INTERCOMM
comm = base.Split(42, 42)
self.assertEqual(comm.Get_rank(), base.Get_rank())
self.assertEqual(comm.Get_size(), base.Get_size())
self.assertEqual(comm.Get_remote_size(), base.Get_remote_size())
comm.Free()
color = base.Get_rank()
comm = base.Split(color, 42)
if comm != MPI.COMM_NULL:
self.assertEqual(comm.Get_rank(), 0)
self.assertEqual(comm.Get_size(), 1)
self.assertEqual(comm.Get_remote_size(), 1)
comm.Free()
@unittest.skipMPI("msmpi")
@unittest.skipMPI("openmpi(<5.0.0)")
@unittest.skipMPI("mpich(<4.2.0)", ch3_nemesis())
@unittest.skipMPI("mvapich(<3.0.0)", MPI.COMM_WORLD.Get_size() > 2)
def testSplitTypeShared(self):
try:
comm = self.INTERCOMM.Split_type(MPI.COMM_TYPE_SHARED)
except NotImplementedError:
self.skipTest("mpi-comm-split_type")
if comm != MPI.COMM_NULL:
comm.Free()
comm = self.INTERCOMM.Split_type(MPI.UNDEFINED)
self.assertEqual(comm, MPI.COMM_NULL)
def testPyProps(self):
comm = self.INTERCOMM
#
self.assertEqual(comm.rank, comm.Get_rank())
self.assertEqual(comm.size, comm.Get_size())
self.assertEqual(comm.remote_size, comm.Get_remote_size())
#
group = comm.remote_group
self.assertEqual(type(group), MPI.Group)
group.Free()
#
info = comm.info
self.assertEqual(type(info), MPI.Info)
info.Free()
#
self.assertTrue(comm.is_inter)
self.assertFalse(comm.is_intra)
class TestIntercomm(BaseTestIntercomm, unittest.TestCase):
#
BASECOMM = MPI.COMM_WORLD
class TestIntercommDup(TestIntercomm):
#
def setUp(self):
self.BASECOMM = self.BASECOMM.Dup()
super().setUp()
def tearDown(self):
self.BASECOMM.Free()
super().tearDown()
class TestIntercommDupDup(TestIntercomm):
#
def setUp(self):
super().setUp()
INTERCOMM = self.INTERCOMM
self.INTERCOMM = self.INTERCOMM.Dup()
INTERCOMM.Free()
@unittest.skipIf(MPI.COMM_WORLD.Get_size() < 2, "mpi-world-size<2")
class TestIntercommCreateFromGroups(unittest.TestCase):
#
@unittest.skipMPI("openmpi", MPI.COMM_WORLD.Get_size() > 2)
def testPair(self):
done = True
rank = MPI.COMM_WORLD.Get_rank()
if rank < 2:
world_group = MPI.COMM_WORLD.Get_group()
local_group = world_group.Incl([rank])
remote_group = world_group.Incl([1 - rank])
world_group.Free()
try:
comm = MPI.Intercomm.Create_from_groups(
local_group,
0,
remote_group,
0,
)
self.assertEqual(comm.Get_size(), 1)
self.assertEqual(comm.Get_remote_size(), 1)
comm.Free()
except NotImplementedError:
done = False
finally:
local_group.Free()
remote_group.Free()
done = MPI.COMM_WORLD.allreduce(done, op=MPI.LAND)
if not done:
self.assertLess(MPI.Get_version(), (4, 0))
self.skipTest("mpi-intercomm-create_from_groups")
def testHalf(self):
done = True
size = MPI.COMM_WORLD.Get_size()
rank = MPI.COMM_WORLD.Get_rank()
world_group = MPI.COMM_WORLD.Get_group()
low_group = world_group.Range_incl([(0, size // 2 - 1, 1)])
high_group = world_group.Range_incl([(size // 2, size - 1, 1)])
world_group.Free()
if rank <= size // 2 - 1:
local_group, remote_group = low_group, high_group
local_leader, remote_leader = 0, high_group.Get_size() - 1
else:
local_group, remote_group = high_group, low_group
local_leader, remote_leader = high_group.Get_size() - 1, 0
try:
comm = MPI.Intercomm.Create_from_groups(
local_group,
local_leader,
remote_group,
remote_leader,
)
self.assertEqual(comm.Get_rank(), local_group.Get_rank())
self.assertEqual(comm.Get_size(), local_group.Get_size())
self.assertEqual(comm.Get_remote_size(), remote_group.Get_size())
comm.Free()
except NotImplementedError:
done = False
finally:
local_group.Free()
remote_group.Free()
if not done:
self.assertLess(MPI.Get_version(), (4, 0))
self.skipTest("mpi-intercomm-create_from_groups")
if __name__ == "__main__":
unittest.main()
|
